Police said 14-year-old Sabir Momin's body, which bears marks of torture, was found from a mango orchard in Nouda-Jadupur gram panchayat this morning.
Sabir, a student of class VII and the son of Ibrahim Momin, was kidnapped yesterday.
The killing was a result of rivalry between two gangs of Kaliachak, police said
After the body was found, local people squatted on the arterial NH-34 for around three hours to protest against the murder.
Police said the agitators pelted stones at them and two policemen sustained minor injuries.